Robert Downey Jr. is getting ready to portray Doctor Doom on the big screen, after portraying Iron Man in the Marvel Cinematic Universe for more than a decade. The acclaimed actor has shared a new photo from the set of Avengers: Doomsday. The image doesn't give anything away in relation to the plot of next year's crossover, but Downey is clearly teasing what is promising to be an unforgettable performance. A comic book featuring Doctor Doom can be seen as one of the things the actor is using for his preparation as the villain.